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Plant performance and survival across transplant experiments depend upon temperature and precipitation change along elevation
Journal of Ecology ( IF 5.3 ) Pub Date : 2020-03-13 , DOI: 10.1111/1365-2745.13387 Gabriele Midolo 1 , Camilla Wellstein 1
中文翻译：
移植实验中的植物生长性能和存活率取决于温度和海拔高度的降水变化
更新日期：2020-03-13
Journal of Ecology ( IF 5.3 ) Pub Date : 2020-03-13 , DOI: 10.1111/1365-2745.13387 Gabriele Midolo 1 , Camilla Wellstein 1
Affiliation
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- Understanding how plant individuals perform in non‐local sites is key in the context of contemporary range shifts along elevation. Transplant experiments conducted in mountain ecosystems are rising as key tools to measure the intraspecific response of individuals transplanted across contrasting elevations. However, a synthesis quantifying patterns of plant performance in response to changes in abiotic factors across different species and mountain ranges is still lacking.
- We conducted a meta‐analysis to quantitatively summarize patterns of plant species' performance variation in response to changes in temperature and precipitation within their elevation range across multiple transplant experiment studies. We compiled a dataset obtained from 38 studies and 49 vascular plant species in total addressing intraspecific performance variation in terms of survival, germination, biomass, height, number of vegetative organs, number of reproductive units, SLA and leaf size. We both compared pairs of transplanted individuals to those growing at their site of origin (‘away vs. home’) and to the local individuals found at the site of transplant (‘foreign vs. local’).
- Overall, individuals transplanted downward showed larger biomass and height compared to their site of origin but failed to adjust these traits and survival to that of local individuals. Individuals transplanted upward adjusted their traits by decreasing plant growth and number of reproductive units to that of local individuals but showed lower survival. Importantly, changes in survival, biomass, height, leaf size, number of vegetative organs and reproductive units increased linearly with the difference in mean annual temperature between site of transplant and site of origin in the ‘away vs. home’ comparison. Conversely, changes in biomass, leaf size, number of vegetative organs and reproductive units increased with mean annual precipitation difference between sites in the ‘foreign vs. local’ comparison.
- Synthesis. We detected common trends in survival and intraspecific trait variation across different species and transplant experiments conducted along elevational gradients. Because plasticity and adaptation play a crucial role in plant shift, establishment and persistence under non‐local environmental conditions, our meta‐analysis contributes to better understand how rapid plant shifts are constrained by climatic conditions within species' elevational range.
中文翻译：
移植实验中的植物生长性能和存活率取决于温度和海拔高度的降水变化
- 在当代海拔高度变化的背景下，了解植物个体在非本地场所的表现至关重要。在山区生态系统中进行的移植实验正在成为衡量跨不同海拔地区移植的个体的种内反应的关键工具。然而，仍然缺乏对不同物种和山脉中非生物因子的变化做出响应的植物表现模式的综合量化方法。
- 我们进行了一项荟萃分析，定量地总结了跨多个移植实验研究的植物物种在其海拔范围内随温度和降水变化而变化的性能变化模式。我们汇总了从38个研究和49种维管植物物种获得的数据集，以解决物种内性能变化方面的生存，发芽，生物量，高度，营养器官数量，生殖单位数量，SLA和叶大小的问题。我们都比较了成对的移植个体与在其原产地生长的个体（“远处对家”）和在移植处发现的本地个体（“外来对本地”）。
- 总体而言，向下移植的个体与其原产地相比显示出更大的生物量和高度，但未能将这些特征和生存能力与当地个体相适应。向上移植的个体通过减少植物的生长和减少繁殖单位的数量来调节其性状，但其存活率较低。重要的是，在“远处对家庭”比较中，随着移植地点和起源地点之间年平均温度的差异，存活率，生物量，高度，叶大小，营养器官和生殖单位数量的变化线性增加。相反，在“外国与地方”比较中，生物量，叶片大小，营养器官和生殖单位数量的变化随地点之间年平均降水量的增加而增加。
- 综合。我们检测了不同物种之间的存活率和种内性状变异的共同趋势，以及沿海拔梯度进行的移植实验。由于可塑性和适应性在非本地环境条件下的植物迁移，建立和持久性中起着至关重要的作用，因此我们的荟萃分析有助于更好地理解植物的快速迁移如何受到物种海拔范围内的气候条件的限制。
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